chamise vs chaparral

chamise

noun
  • An evergreen shrub native to California, Adenostoma fasciculatum in the botanical family Rosaceae 

chaparral

noun
  • The foliage of creosote bush, Larrea divaricata, when used as a medicinal herb. 

  • A region of shrubs, typically dry in the summer and rainy in the winter. The coast of the Mediterranean is such a region. 

How often have the words chamise and chaparral occurred in a corpus of books? (source: Google Ngram Viewer )